ClinVar

Description

Variant summary: VHL c.492G>T (p.Gln164His) results in a non-conservative amino acid change located in the alpha domain (IPR024048) of the encoded protein sequence. Four of five in-silico tools predict a damaging effect of the variant on protein function. The variant was absent in 251444 control chromosomes (gnomAD). c.492G>T has been reported in the literature in heterozygous individuals affected with Von Hippel-Lindau Syndrome (e.g., Kreusel_2000, Kreusel_2007, Papathomas_2015) as well as a compound heterozygous individual affected with congenital polycythemia (e.g., Lenglet_2018). These data indicate that the variant is may be associated with both autosomal recessive and dominant disease. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. The following publications have been ascertained in the context of this evaluation (PMID: 17392848, 11148816, 29891534, 25720320). Three submitters have reported clinical-significance assessments for this variant to ClinVar after 2014. All submitters classified the variant as pathogenic/likely pathogenic. Additionally, a different missense variant affecting the same codon, namely c.491A>G (p.Gln164Arg), has been classified as pathogenic by our lab, and another variant causing the same missense change, c.492G>C (p.Gln164His), has been reported in multiple individuals affected with Von Hippel-Lindau Syndrome (PMIDs: 12807974, 19215943) and classified as pathogenic/likely pathogenic in ClinVar. Based on the evidence outlined above, the variant was classified as likely pathogenic.